| Case Name |
Fall from ladder under garden tree pruning work. |
| Pictograph |
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| Overview |
Generated crash disaster in garden of the private house under tree pruning work of the pine.
The worker lost his balance and fell, when he had finished the pruning of a part of one group of the branch the pine, and he got off the ladder to do back part of branch. |
| Incident |
The victim carried out pruning of the one group of upper ( about 3.7m - 5.0m heights ) branch of the tree 90 minute after starting work, and when he was start to next work, he lose his balance and fell from the eighth stage ( about 2.3m heights ) of the ladder onto a concrete alley way, got a hard knock on the head and died. |
| Sequence |
The pruning work of the tree which was in the garden a private house was carried out by a worker of the leader ranking and the victim.
After they arrived to client's residence the moving, they made arrangement about 10 minute. By arranged, the victim was doing pruning work of a pine at foreyard near the porch and the other doing pruning work of garden plants at the back yard.
The leader worker told the victim to wear a helmet and a safety belt while working.
The victim carried out pruning of the one group of a branch part ( about 3.7m - 5.0m heights ) over the tree for about over 90 minute.
The victim was working without using a safety belt or wearing helmet at that time.
When moving, he lose his balance and fell from eighth stage ( about 2.3m heights ) of a ladder onto a concrete alley way, got a hard knock on the head and died. |
| Cause |
Despite the fact that there was a danger of a crash at the pruning work which was carried out about 2.3m height from the ground, there was no crash prevention measures such as installing safety belt to the tree of pine, etc.
Even though the position of the fall was on the alley way made of the concrete, he didn't wear a helmet ( the protection cap ).
Safety direction during work wasn't sufficient. |
| Countermeasures |
To prevent a similar disaster it is necessary to adhere to the following points.to complete following points.
The completeness of the crash prevention measures : In pruning work of the pine of trees, at the height of about 5m, in such work, there are many cases to use ladder, worker must wear safety belt, pass a support rope around a tree and keep working stability posture as basic safety measures. When to repeat the work, it should carried out with put some support ropes around adequate position of the branch.
Ensure safety during the work and going up and down: When a worker is working with use and up-down the ladder, it must wear a protection cap, runs up and down with making sure of its foothold careflly. Making arrangements for safty working which basis on the pruning work of the tree, and training in order to advance the work according to the procedure.
THe workers must carry out works procedure according to the manual. |
| Knowledge Comment |
A minimum measure of safety is necessary. |
| Background |
This crash disaster is called "the repetitive type " disaster, and similar accidents breakout familiar (about 40% of the labor accident of construction work are crash and fall disaster ) , but consciousness that such disaster can happen to itself or familiar workers are generally low, and the minimum measure safety is sometimes made light. |
| Incidental Discussion |
It is supposed to be representative as "the repetition type" disaster, because it is arising in form, surprising great numbers of crash disaster had happened similar case, though each situation and background are different. Many classic of which generation of homogeneous disaster was described. For example, in a old essay "Tsureduregusa" written by Kenko Yoshida there is knowledge of a expert of tree-climber for crash disaster at #109 part, "It is sure that a fault becomes when a easy situations". |
| Reason for Adding to DB |
It was a typical case to be found here and there as a crash disaster, and it was a case which could have been prevented if precautionary steps for the minimum crash protective measure had been taken. |
| Scenario |
| Primary Scenario
|
Poor Value Perception, Poor Safety Awareness, Poor Value Perception, Poor Safety Awareness, Carelessness, Insufficient Understanding, Regular Movement, Dangerous Movement, Bodily Harm, Harm to Physical Well-being, Bodily Harm, Death
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| Sources |
http://www.jaish.gr.jp/
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| Number of Deaths |
1 |
| Number of Injuries |
0 |
| Financial Cost |
Indefinite |
| Economic Loss |
Indefinite |
| Consequences |
Nothing |
| Field |
Civil Engineering
|
| Author |
SUZUKI, Yoshimi (National Institute of Industrial Safety)
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